Flesh out more specifics around code review

See merge request gitlab-org/gitlab!16597

[EE] Better indication that an issue has been duplicated

See merge request gitlab-org/gitlab!16204

- Also includes db migration to track duplicated reference

Exclude null records from index on `events(group_id)`

See merge request gitlab-org/gitlab-ee!16619

Use 403 when PA licensed feature is not available

See merge request gitlab-org/gitlab!16594

The frontend code expects the 403 HTTP response code to be returned
in order display message about the missing license or missing user
permission on the productivity analytics page.

Use new project names in asset image generation

See merge request gitlab-org/gitlab!16541

This improves the index size by removing all records with `group_id`
from the index. On GitLab.com this means reducing the size from 9 GB to
8kb (as long as the column stays mostly null).

Relates to
https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/32826#note_214690051

Call NotifyService from NotificationsController

See merge request gitlab-org/gitlab-ee!16508

Moves Buy additional minutes button to the pipelines tab

Closes #14694

See merge request gitlab-org/gitlab-ee!16443

Use Pull Request number instead of ID

See merge request gitlab-org/gitlab-ee!16504

Partial index for namespaces.type

See merge request gitlab-org/gitlab-ee!16571

Create table `alerts_service_data`

See merge request gitlab-org/gitlab-ee!16607

This table contains data for the `AlertsService` avoiding the usage of
properties.

Add cop to check for GraphQL field descriptions (EE)

See merge request gitlab-org/gitlab-ee!16438

NotifyService doesn't need to know about some service params
such as "controller" and "action"

Connecting the dots by calling
`Projects::Alerting::NotifyService`
from `Projects::Alerting::NotificationsController`

Also avoid using long running transaction
in ExternalPullRequest::CreatePipelineService

Add e2e tests for group audit logs

See merge request gitlab-org/gitlab-ee!16050

These can be fixed one by one, and until then, they are all
tagged to be ignored so we can backfill the descriptions in time.

- Fix typo
- Remove reference to outdated files
- Restrict directories to `app/graphql` and `ee/app/graphql` via
`.rubocop.yml`
- Correct all missing descriptions

Add a comment to disable to the cop for every missing GraphQL
description. When folks backfill the description to satisfy the cop,
they can remove the line.

Since we are now including arguments, and (probably) enums,
this is just called GraphQL Descriptions unless it proves
to be confusing.

Cluster environments BE/FE integration

See merge request gitlab-org/gitlab-ee!15515

Also adds the required qa-selectors

Avoid dns rebinding checks when the domain is whitelisted

Closes #31538

See merge request gitlab-org/gitlab-ee!16529

If the domain is whitelisted we skip dns rebinding checks as well
as local host checks

Ensure feature flags are set properly

Closes gitlab-org/quality/nightly#129

See merge request gitlab-org/gitlab-ee!16437

Also adds unit tests for Runtime::Feature.enabled?

EE: Show cluster link on job page

See merge request gitlab-org/gitlab-ee!16361

When the user has permissions (ie. maintainer) they can follow this link
to the cluster page. Otherwise they can always view this cluster name.
This is to implement
https://gitlab.com/gitlab-org/gitlab-ce/issues/55095 and helps users
debug cluster deployments.

This cluster detail will be used to show cluster link in the job output
as per https://gitlab.com/gitlab-org/gitlab-ce/issues/55095 . We needed
to create a new model here for ClusterBasicEntity as the only other
model ClusterStatus had much more data than necessary including nested
model lookups for applications.

Use a unique metric tag for each email handler

See merge request gitlab-org/gitlab-ee!16577

Otherwise there is a possibility that within the same
Sidekiq process, that same event with different
metrics_params will cause Prometheus to
throw an error, "labels must have the same signature"

Add end-to-end test for issue mention

See merge request gitlab-org/gitlab-ee!16485